Coffee rust looks very similar to ozone pollution damage as you'll see in the link. No mention of ozone nor pollution in the article. No matter, feeding the world is everyone's problem.http://truth-out.org/news/item/27992-climate-change-creates-new-geography-of-foodcatman306

No doubt there is coffee rust - just like there is bacterial wilt disease and countless other opportunistic biotic attacks. Then, they can always fall back on drought...http://www.nasa.gov/content/goddard/13-year-record-of-drying-amazon-caused-vegetation-declines/#.VI3a-2TF_8l